Liquid crystal display device

Abstract

According to one embodiment, a display device comprises first and second substrates and a liquid crystal layer. The second substrate has first and second surfaces and a side surface elongated in a first direction. The side surface includes first and second inclined surfaces on which end portions on the first surface side further protrude in a second direction intersecting the first direction than end portions on the second surface side. The first inclined surface is inclined at a first angle to a thickness direction of the second substrate. The second inclined surface is inclined at a second angle smaller than the first angle to the thickness direction.

What is claimed is: 
     
       1. A liquid crystal display device comprising:
 a first substrate; 
 a second substrate having a first surface opposed to the first substrate; a second surface opposite to the first surface, and a side surface elongated in a first direction; and 
 a liquid crystal layer between the first substrate and the second substrate, 
 wherein 
 the side surface includes a first inclined surface and a second inclined surface on which end portions on the first surface side further protrude in a second direction intersecting the first direction than end portions on the second surface side, 
 the first inclined surface is inclined at a first angle to a thickness direction of the second substrate, 
 the second inclined surface is inclined at a second angle smaller than the first angle to the thickness direction, 
 the side surface further includes a third inclined surface that is located between the second inclined surface and the first substrate and on which an end portion on the first surface side further protrudes in the second direction than an end portion on the second surface side, and 
 the third inclined surface is inclined at a third angle larger than the second angle to the thickness direction. 
 
     
     
       2. The liquid crystal display device of  claim 1 , further comprising:
 a light source applying light onto the side surface. 
 
     
     
       3. The liquid crystal display device of  claim 2 , wherein
 the first substrate includes an elongated region that is more elongated in the second direction than the side surface, and 
 the light source is arranged on the elongated region. 
 
     
     
       4. The liquid crystal display device of  claim 2 , further comprising:
 a lens located between the light source and the side surface to control a width in the second direction of the light emitted from the light source. 
 
     
     
       5. The liquid crystal display device of  claim 4 , further comprising:
 a resin layer filling a gap between the lens and the side surface. 
 
     
     
       6. The liquid crystal display device of  claim 1 , wherein
 the second inclined surface is located between the first inclined surface and an end portion of the side surface in the first direction. 
 
     
     
       7. The liquid crystal display device of  claim 1 , wherein
 a width in the thickness direction of the third inclined surface is 60% or less of a thickness of the second substrate. 
 
     
     
       8. The liquid crystal display device of  claim 1 , wherein
 the end portion on the first surface side of the first inclined surface protrudes at a first height to the end portion on the second surface side of the first inclined surface, 
 the end portion on the first surface side of the third inclined surface protrudes at a second height to the end portion on the second surface side of the second inclined surface; and 
 the second height is larger than the first height. 
 
     
     
       9. The liquid crystal display device of  claim 8 , wherein
 a width in the thickness direction of the third inclined surface is 30% or less of a thickness of the second substrate; and 
 the second height is 40% or less of the thickness of the second substrate. 
 
     
     
       10. The liquid crystal display device of  claim 1 , wherein
 each of the first angle and the second angle is 15 degrees or less, and 
 the third angle is 30 degrees or more. 
 
     
     
       11. The liquid crystal display device of  claim 1 , further comprising:
 a connection structure located closer to the side surface than a display region, 
 wherein 
 the connection structure electrically connects the first substrate with the second substrate, and 
 the connection structure and the second inclined surface are arranged in the second direction. 
 
     
     
       12. The liquid crystal display device of  claim 11 , wherein
 the display region includes a plurality of pixels, 
 the first substrate comprises pixel electrodes provided in the plurality of pixels, respectively, 
 the second substrate comprises a common electrode opposed to the pixel electrodes, and 
 the connection structure comprises a pad provided on the first substrate, and a conductive member arranged between the first substrate and the second substrate to electrically connect the pad with the common electrode. 
 
     
     
       13. The liquid crystal display device of  claim 12 , further comprising:
 a first sealing member arranged between the first substrate and the second substrate and surrounding the display region, 
 wherein 
 the conductive member is arranged outside the first sealing member. 
 
     
     
       14. The liquid crystal display device of  claim 13 , further comprising:
 a linear second sealing member arranged between the first sealing member and the side surface, 
 wherein 
 the second sealing member does not exist between the connection structure and the side surface. 
 
     
     
       15. The liquid crystal display device of  claim 14 , wherein
 an air layer is formed between the first sealing member and the second sealing member. 
 
     
     
       16. The liquid crystal display device of  claim 14 , wherein
 the first sealing member includes a curved portion, and 
 the connection structure is located between an end portion in the first direction of the second substrate and the curved portion. 
 
     
     
       17. The liquid crystal display device of  claim 11 , wherein
 the connection structure is located more closely to an end portion in the first direction of the second substrate than the display region in the first direction. 
 
     
     
       18. The liquid crystal display device of  claim 2 , further comprising:
 a transparent cover member opposed to the second surface, 
 wherein 
 the light source applies light to a side surface of the cover member. 
 
     
     
       19. A liquid crystal display device comprising:
 a first substrate; 
 a second substrate having a first surface opposed to the first substrate, a second surface opposite to the first surface, and a side surface elongated in a first direction; and 
 a liquid crystal layer between the first substrate and the second substrate, 
 wherein 
 the side surface includes a first inclined surface and a second inclined surface on which end portions on the first surface side further protrude in a second direction intersecting the first direction than end portions on the second surface side, 
 the first inclined surface is inclined at a first angle to a thickness direction of the second substrate, 
 the second inclined surface is inclined at a second angle smaller than the first angle to the thickness direction, and 
 a length in the first direction of the second inclined surface is 5% or less of a full length of the side surface.